Some entites are in a hurry to get back to the Universal mind.They can come back in two bodies at the sametime living two lives to help speed up there advancement.A part of each entity is anchored on the life between lives.Me personally I think it only makes both lives weaker but who knows it must work or they wouldn't do it.
Myself I have desided to come back with a certain entity many times already.We both have tracked at least 15 lives or so through past life regression and a police pychic and Silvia Brown.If your one of the lucky ones and have desided to this and have found your friend you know what I mean a feeling of being one.